HCPL-7710/0710 40 ns Propagation Delay, CMOS Optocoupler Data Sheet Lead (Pb) Free RoHS 6 fully compliant RoHS 6 fully compliant options available; -xxxE denotes a lead-free product Description Available in either an 8-pin DIP or SO-8 package style respectively, the HCPL-7710 or HCPL-0710 optocouplers utilize the latest CMOS IC technology to achieve outstanding performance with very low power consumption. The HCPL-x710 require only two bypass capacitors for complete CMOS compatibility. Basic building blocks of the HCPL-x710 are a CMOS LED driver IC, a high speed LED and a CMOS detector IC. A CMOS logic input signal controls the LED driver IC, which supplies current to the LED. The detector IC incorporates an integrated photodiode, a high-speed transimpedance amplifier, and a voltage comparator with an output driver. Functional Diagram 1 **VDD1 8 2 VI 7 IO 3 NC* VDD2** NC* 6 VO 5 GND2 VI, INPUT LED1 VO, OUTPUT H L OFF Applications ON H L LED1 4 GND1 SHIELD Features • +5 V CMOS compatibility • 8 ns maximum pulse width distortion • 20 ns maximum prop. delay skew • High speed: 12 Mbd • 40 ns maximum prop. delay • 10 kV/µs minimum common mode rejection • -40°C to 100°C temperature range • Safety and regulatory approvals UL Recognized 3750 Vrms for 1 min. per UL 1577 5000 Vrms for 1 min. per UL 1577 (for HCPL-7710 option 020) CSA Component Acceptance Notice #5 IEC/EN/DIN EN 60747-5-5 – VTABLE IORM = 630 Vpeak for HCPL-7710 Option 060 TRUTH (POSITIVE LOGIC) – VIORM = 567 Vpeak for HCPL-0710 Option 060 • • • • • Digital fieldbus isolation: DeviceNet, SDS, Profibus AC plasma display panel level shifting Multiplexed data transmission Computer peripheral interface Microprocessor system interface * Pin 3 is the anode of the internal LED and must be left unconnected for guaranteed data sheet performance. Pin 7 is not connected internally. ** A 0.1 µF bypass capacitor must be connected between pins 1 and 4, and 5 and 8. 8 IO VDD2** 7 NC* 6 VO 5 GND2 TRUTH TABLE (POSITIVE LOGIC) VI, INPUT LED1 VO, OUTPUT H L OFF ON H L CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD. Selection Guide 8-Pin DIP (300 Mil) HCPL-7710 Small Outline SO-8 HCPL-0710 Ordering Information HCPL-0710 and HCPL-7710 are UL Recognized with 3750 Vrms for 1 minute per UL1577. Option Part number HCPL-7710 HCPL-0710 RoHS Compliant Non RoHS Compliant -000E No option -300E #300 X X -500E #500 X X -020E -020 -320E -320 -520E -520 -060E #060 -360E #360 X X -560E #560 X X -000E No option X -500E #500 -060E #060 -560E #560 Package Surface Mount Gull Wing Tape & Reel UL 5000 Vrms/ 1 Minute IEC/EN/DIN rating EN 60747-5-5 Quantity 50 per tube 300mil DIP-8 SO-8 X X X X X 50 per tube X X X X 50 per tube X 50 per tube X 1000 per reel X 50 per tube X 50 per tube X 1000 per reel 100 per tube X X X 1000 per reel X 1500 per reel X 100 per tube X 1500 per reel To order, choose a part number from the part number column and combine with the desired option from the option column to form an order entry. Example 1: HCPL-7710-560E to order product of Gull Wing Surface Mount package in Tape and Reel packaging with IEC/EN/ DIN EN 60747-5-5 Safety Approval in RoHS compliant. Example 2: HCPL-0710 to order product of Small Outline SO-8 package in tube packaging and non RoHS compliant. Option datasheets are available. Contact your Avago sales representative or authorized distributor for information. Remarks: The notation ‘#XXX’ is used for existing products, while (new) products launched since 15th July 2001 and RoHS compliant option will use ‘-XXXE‘. 2 Package Outline Drawing HCPL-7710 8-Pin DIP Package 7.62 ± 0.25 (0.300 ± 0.010) 9.65 ± 0.25 (0.380 ± 0.010) 8 TYPE NUMBER 7 6 5 6.35 ± 0.25 (0.250 ± 0.010) DATE CODE A XXXX YYWW 1 2 3 4 1.78 (0.070) MAX. 1.19 (0.047) MAX. + 0.076 - 0.051 + 0.003) (0.010 - 0.002) 0.254 5° TYP. 4.70 (0.185) MAX. 0.51 (0.020) MIN. 2.92 (0.115) MIN. 1.080 ± 0.320 (0.043 ± 0.013) DIMENSIONS IN MILLIMETERS AND (INCHES). *MARKING CODE LETTER FOR OPTION NUMBERS "L" = OPTION 020 "V" = OPTION 060 OPTION NUMBERS 300 AND 500 NOT MARKED. 0.65 (0.025) MAX. 2.54 ± 0.25 (0.100 ± 0.010) Package Outline Drawing HCPL-7710 Package with Gull Wing Surface Mount Option 300 PAD LOCATION (FOR REFERENCE ONLY) 9.65 ± 0.25 (0.380 ± 0.010) 8 7 6 1.016 (0.040) 1.194 (0.047) 5 4.826 TYP. (0.190) 6.350 ± 0.25 (0.250 ± 0.010) 1 2 3 9.398 (0.370) 9.906 (0.390) 4 1.194 (0.047) 1.778 (0.070) 1.19 (0.047) MAX. 1.780 (0.070) MAX. 9.65 ± 0.25 (0.380 ± 0.010) 7.62 ± 0.25 (0.300 ± 0.010) 4.19 MAX. (0.165) 1.080 ± 0.320 (0.043 ± 0.013) 0.635 ± 0.130 2.54 (0.025 ± 0.005) (0.100) BSC DIMENSIONS IN MILLIMETERS (INCHES). LEAD COPLANARITY = 0.10 mm (0.004 INCHES). 3 0.635 ± 0.25 (0.025 ± 0.010) 0.381 (0.015) 0.635 (0.025) + 0.076 0.254 - 0.051 + 0.003) (0.010 - 0.002) 12° NOM. Package Outline Drawing HCPL-0710 Outline Drawing (Small Outline SO-8 Package) LAND PATTERN RECOMMENDATION 8 7 5 XXXV YWW 3.937 ± 0.127 (0.155 ± 0.005) PIN ONE 6 1 2 3 0.406 ± 0.076 (0.016 ± 0.003) 5.994 ± 0.203 (0.236 ± 0.008) TYPE NUMBER (LAST 3 DIGITS) DATE CODE 7.49 (0.295) 4 1.9 (0.075) 1.270 BSC (0.050) 0.64 (0.025) * 5.080 ± 0.127 (0.200 ± 0.005) 3.175 ± 0.127 (0.125 ± 0.005) 0.432 45° X (0.017) 7° 1.524 (0.060) * TOTAL PACKAGE LENGTH (INCLUSIVE OF MOLD FLASH) 5.207 ± 0.254 (0.205 ± 0.010) 0 ~ 7° 0.228 ± 0.025 (0.009 ± 0.001) 0.203 ± 0.102 (0.008 ± 0.004) 0.305 MIN. (0.012) DIMENSIONS IN MILLIMETERS (INCHES). LEAD COPLANARITY = 0.10 mm (0.004 INCHES) MAX. OPTION NUMBER 500 NOT MARKED. NOTE: FLOATING LEAD PROTRUSION IS 0.15 mm (6 mils) MAX. Solder Reflow Thermal Profile Recommended reflow condition as per JEDEC Standard, J-STD-020 (latest revision). Non-Halide Flux should be used. Regulatory Information The HCPL-x710 have been approved by the following organizations: UL Recognized under UL 1577, component recognition program, File E55361. CSA Approved under CSA Component Acceptance Notice #5, File CA 88324. IEC/EN/DIN EN 60747-5-5 4 Insulation and Safety Related Specifications Value Parameter Symbol 7710 0710 Units Minimum External Air L(I01) 7.1 4.9 mm Gap (Clearance) Minimum External L(I02) 7.4 4.8 mm Tracking (Creepage) Minimum Internal Plastic 0.08 0.08 mm Gap (Internal Clearance) Tracking Resistance CTI ≥175 ≥175 V (Comparative Tracking Index) Isolation Group IIIa IIIa All Avago data sheets report the creepage and clearance inherent to the optocoupler component itself. These dimensions are needed as a starting point for the equipment designer when determining the circuit insulation requirements. However, once mounted on a printed circuit board, minimum creepage and clearance requirements must be met as specified for individual equipment standards. For creepage, the shortest distance path along the 5 Conditions Measured from input terminals to output terminals, shortest distance through air. Measured from input terminals to output terminals, shortest distance path along body. Insulation thickness between emitter and detector; also known as distance through insulation. DIN IEC 112/VDE 0303 Part 1 Material Group (DIN VDE 0110, 1/89, Table 1) surface of a printed circuit board between the solder fillets of the input and output leads must be considered. There are recommended techniques such as grooves and ribs, which may be used on a printed circuit board to achieve desired creepage and clearances. Creepage and clearance distances will also change depending on factors such as pollution degree and insulation level. IEC/EN/DIN EN 60747-5-5 Insulation Related Characteristics* (Option 060) Description Symbol Installation classification per DIN VDE 0110, Table 1 for rated mains voltage ≤ 150 Vrms for rated mains voltage ≤ 300 Vrms for rated mains voltage ≤ 600 Vrms Climatic Classification Pollution Degree (DIN VDE 0110/39) Maximum Working Insulation Voltage VIORM Input-to-Output Test Voltage, Method b* VPR VIORM x 1.875 = VPR, 100% Production Test with tm = 1 sec, Partial Discharge < 5 pC Input-to-Output Test Voltage, Method a* VPR VIORM x 1.6 = VPR, Type and Sample Test, tm = 10 sec, Partial Discharge < 5 pC Highest Allowable Overvoltage VIOTM (Transient Overvoltage, tini = 60 sec) Safety Limiting Values - maximum values allowed in the event of a failure Case Temperature TS Input Current IS,INPUT Output Power PS,OUTPUT Insulation Resistance at TS, V10 = 500 V RIO Characteristic HCPL-7710 HCPL-0710 Units I-IV I-IV I-IV 55/85/21 2 630 1181 I-IV I-III I-III 55/85/21 2 567 Vpeak 1063 Vpeak 1008 907 Vpeak 8000 6000 Vpeak 175 230 600 ≥109 150 150 600 ≥109 °C mA mW Ω * Refer to the front of the optocoupler section of the Isolation and Control Component Designer’s Catalog, under Product Safety Regulations section IEC/EN/DIN EN 60747-5-5, for a detailed description of Method a and Method b partial discharge test profiles. Note: These optocouplers are suitable for “safe electrical isolation” only within the safety limit data. Maintenance of the safety data shall be ensured by means of protective circuits. Note: The surface mount classification is Class A in accordance with CECC 00802. Absolute Maximum Ratings Parameter Storage Temperature Ambient Operating Temperature Supply Voltages Input Voltage Output Voltage Input Current Average Output Current Lead Solder Temperature Solder Reflow Temperature Profile Symbol Min. Max. Units TS –55 125 °C TA –40 +100 °C VDD1, VDD2 0 6.0 Volts VI –0.5 VDD1 +0.5 Volts VO –0.5 VDD2 +0.5 Volts II –10 +10 mA IO 10 mA 260°C for 10 sec., 1.6 mm below seating plane See Solder Reflow Temperature Profile Section Recommended Operating Conditions Parameter Ambient Operating Temperature Supply Voltages Logic High Input Voltage Logic Low Input Voltage Input Signal Rise and Fall Times Symbol Min. TA –40 VDD1, VDD2 4.5 VIH 2.0 VIL 0.0 tr, tf 6 Max. +100 5.5 VDD1 0.8 1.0 Units °C V V V ms Electrical Specifications Test conditions that are not specified can be anywhere within the recommended operating range. All typical specifications are at TA = +25 °C, VDD1 = VDD2 = +5 V. DC Specifications Parameter Symbol Logic Low Input Supply Current [1] Typ. Max. Units Test Conditions IDD1L 6.0 10.0 mA VI = 0 V Logic High Input Supply Current IDD1H 1.5 3.0 mA VI = VDDI Input Supply Current IDD1 13.0 mA Output Supply Current IDD2 11.0 mA Input Current II 10 µA Logic High Output VOH Voltage Min. 5.5 -10 4.4 4.0 Logic Low Output VOL Voltage 5.0 V 4.8 IO = -20 µA, VI = VIH IO = -4 mA, VI = VIH 0 0.5 0.1 V 1.0 IO = -20 µA, VI = VIL IO = -4 mA, VI = VIL Typ. Max. Test Conditions Switching Specifications Parameter Symbol Min. Units Propagation Delay Time tPHL 20 40 ns to Logic Low Output [2] CL = 15 pF CMOS Signal Levels Propagation Delay Time tPLH 23 40 ns to Logic High Output CL = 15 pF CMOS Signal Levels Pulse Width [3] PW 80ns CL = 15 pF CMOS Signal Levels Data Rate [3] 12.5 MBd CL = 15 pF CMOS Signal Levels Pulse Width Distortion [4] PWD 3 8 ns |tPHL - tPLH| CL = 15 pF CMOS Signal Levels Propagation Delay Skew [5] CL = 15 pF tPSK 20 ns Output Rise Time tR 9 ns (10 - 90%) CL = 15 pF CMOS Signal Levels Output Fall Time tF 8 ns (90 - 10%) CL = 15 pF CMOS Signal Levels Common Mode |CMH| 10 20 kV/µs Transient Immunity at Logic High Output [6] VI = VDD1, VO > 0.8 VDD1, VCM = 1000 V Common Mode |CML| 10 20 kV/µs Transient Immunity at Logic Low Output [6] VI = 0 V, VO > 0.8 V, VCM = 1000 V Input Dynamic Power Dissipation Capacitance [7] CPD1 60 pF Output Dynamic Power Dissipation Capacitance [7] CPD2 10 pF 7 Package Characteristics Parameter Symbol Min. Input-Output Momentary Withstand Voltage [8, 9, 10] 0710 VISO Typ. Max. 3750 7710 3750 Option 020 5000 Units Test Conditions Vrms RH = 50%, t = 1 min., TA = 25 °C Resistance (Input-Output) [8] RI-O 1012 W VI-O = 500 Vdc Capacitance (Input-Output) [8] CI-O 0.6 pF f = 1 MHz Input Capacitance [11] CI 3.0 qjci 145 °C/W Thermocouple located at center underside of package Input IC Junction-to-Case Thermal Resistance -7710 Output IC Junction-to-Case Thermal Resistance -7710 -0710 160 qjco 140 -0710 135 Package Power Dissipation PPD 150 mW Notes: 1. The LED is ON when VI is low and OFF when VI is high. 2. tPHL propagation delay is measured from the 50% level on the falling edge of the VI signal to the 50% level of the falling edge of the VO signal. tPLH propagation delay is measured from the 50% level on the rising edge of the VI signal to the 50% level of the rising edge of the VO signal. 3. Mimimum Pulse Width is the shortest pulse width at which 10% maximum, Pulse Width Distortion can be guaranteed. Maximum Data Rate is the inverse of Minimum Pulse Width. Operating the HCPL-x710 at data rates above 12.5 MBd is possible provided PWD and data dependent jitter increases and relaxed noise margins are tolerable within the application. For instance, if the maximum allowable variation of bit width is 30%, the maximum data rate becomes 37.5 MBd. Note: HCPL-x710 performances above 12.5 MBd are not guaranteed by Avago. 4. PWD is defined as |tPHL - tPLH|. %PWD (percent pulse width distortion) is equal to the PWD divided by pulse width. 5. tPSK is equal to the magnitude of the worst case difference in tPHL and/or tPLH that will be seen between units at any given temperature within the recommended operating conditions. 6. CMH is the maximum common mode voltage slew rate that can be sustained while maintaining VO > 0.8 VDD2. CML is the maximum common mode voltage slew rate that can be sustained while maintaining VO < 0.8 V. The common mode voltage slew rates apply to both rising and falling common mode voltage edges. 7. Unloaded dynamic power dissipation is calculated as follows: CPD * VDD2 * f + IDD * VDD, where f is switching frequency in MHz. 8. Device considered a two-terminal device: pins 1, 2, 3, and 4 shorted together and pins 5, 6, 7, and 8 shorted together. 9. In accordance with UL1577, each HCPL-0710 is proof tested by applying an insulation test voltage ≥4500 VRMS for 1 second (leakage detection current limit, II-O ≤5 µA). Each HCPL-7710 is proof tested by applying an insulation test voltage ≥ 4500 VRMS for 1 second (leakage detection current limit, II-O ≤ 5 µA). 10. The Input-Output Momentary Withstand Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous voltage rating. For the continuous voltage rating refer to your equipment level safety specification or Avago Application Note 1074 entitled “Optocoupler Input-Output Endurance Voltage.” 11. CI is the capacitance measured at pin 2 (VI). 2.2 5 0 °C 25 °C 85 °C 2 1.9 1.8 1 1.7 0 1 2 3 4 VI (V) Figure 1. Typical output voltage vs. input voltage HCPL-0710 fig 1 8 27 TPLH, TPHL (ns) 3 0 29 0 °C 25 °C 85 °C 2.0 VITH (V) 4 VO (V) 2.1 5 1.6 4.5 25 TPLH 23 TPHL 21 19 17 4.75 5 5.25 5.5 VDD1 (V) Figure 2. Typical input voltage switching threshold vs. input supply voltage HCPL-0710 fig 2 15 0 10 20 30 40 50 60 70 80 TA (C) Figure 3. Typical propagation delays vs. temperature HCPL-0710 fig 3 4 7 15 6 3 2 TF (ns) TR (ns) PWD (ns) 14 13 1 0 4 3 20 0 40 60 12 80 20 0 40 TA (C) 60 2 80 6 27 5 25 25 23 21 19 19 TR (ns) PWD (ns) TPLH 3 2 15 15 20 25 30 35 40 45 0 50 17 15 13 11 9 1 17 7 15 20 25 30 35 40 45 5 50 0 5 10 C I (pF) CI (pF) Figure 7. Typical propagation delays vs. output load capacitance 80 HCPL-0710 fig 6 4 TPHL 60 Figure 6. Typical fall time vs. temperature HCPL-0710 fig 5 29 21 40 TA (C) Figure 5. Typical rise time vs. temperature HCPL-0710 fig 4 23 20 0 TA (C) Figure 4. Typical pulse width distortion vs. temperature TPLH, TPHL (ns) 5 Figure 8. Typical pulse width distortion vs. output load capacitance 15 20 25 30 35 CI (pF) Figure 9. Typical rise time vs. load capacitance HCPL-0710 fig 9 FALL TIME (ns) 8 7 6 5 4 3 2 1 0 0 5 10 15 20 25 30 CI (pF) Figure 10. Typical fall time vs. load capacitance HCPL-0710 fig 10 9 35 STANDARD 8 PIN DIP PRODUCT 800 P S (mW) I S (mA) 700 600 500 400 300 (230) 200 100 0 0 25 50 75 100 125 150 175 200 T A - CASE TEMPERATURE - o C OUTPUT POWER - P S , INPUT CURRENT - I S 9 OUTPUT POWER - P S , INPUT CURRENT - I S 10 SURFACE MOUNT SO8 PRODUCT 800 P S (mW) I S (mA) 700 600 500 400 300 200 (150) 100 0 0 25 50 75 100 125 150 175 200 T A - CASE TEMPERATURE - o C Figure 11. Thermal derating curve, dependence of Safety Limiting Value with case temperature per IEC/EN/DIN EN 60747-5-5 Application Information Bypassing and PC Board Layout The HCPL-x710 optocouplers are extremely easy to use. No external interface circuitry is required because the HCPL-x710 use high-speed CMOS IC technology allowing CMOS logic to be connected directly to the inputs and outputs. As shown in Figure 12, the only external components VDD1 VDD2 8 1 required for proper operation are two bypass capacitors. Capacitor values should be between 0.01 µF and 0.1 µF. For each capacitor, the total lead length between both ends of the capacitor and the power-supply pins should not exceed 20 mm. Figure 13 illustrates the recommended printed circuit board layout for the HPCL-x710. C1 C2 VI NC 3 GND1 7 NC 710 YYWW 2 6 VO 5 4 GND2 C1, C2 = 0.01 µF TO 0.1 µF Figure 12. Recommended Printed Circuit Board layout. VDD1 VDD2 710 YYWW VI C1 C2 VO HCPL-0710 fig 11 GND1 GND2 C1, C2 = 0.01 µF TO 0.1 µF Figure 13. Recommended Printed Circuit Board layout. Propagation Delay, Pulse-Width Distortion and Propagation Delay Skew Propagation Delay is a figure of meritHCPL-0710 that describes fig 12 how quickly a logic signal propagates through a system. The propagation delay from low to high (tPLH) is the amount of time required for an input signal to propagate to the output, causing the output to change INPUT VI 5 V CMOS 50% tPLH OUTPUT VO from low to high. Similarly, the propagation delay from high to low (tPHL) is the amount of time required for the input signal to propagate to the output, causing the output to change from high to low. See Figure 14. 10% 0V tPHL 90% 90% Figure 14. 10 HCPL-0710 fig 13 10% VOH 2.5 V CMOS VOL Pulse-width distortion (PWD) is the difference between tPHL and tPLH and often determines the maximum data rate capability of a transmission system. PWD can be expressed in percent by dividing the PWD (in ns) by the minimum pulse width (in ns) being transmitted. Typically, PWD on the order of 20 - 30% of the minimum pulse width is tolerable. The PWD specification for the HCPL-x710 is 8 ns (10%) maximum across recommended operating condi tions. 10% maximum is dictated by the most stringent of the three fieldbus standards, PROFIBUS. Propagation delay skew is defined as the difference between the minimum and maximum propa gation delays, either tPLH or tPHL, for any given group of optocoup lers that are operating under the same conditions (i.e., the same drive current, supply voltage, output load, and operating temperature). As illustrated in Figure 15,if the inputs of a group of optocouplers are switched either ON or OFF at the same time, tPSK is the difference between the shortest propagation delay, either tPLH or tPHL, and the longest propagation delay, either tPLH or tPHL. Propagation delay skew, tPSK, is an important parameter to consider in parallel data applications where synchronization of signals on parallel data lines is a concern. If the parallel data is being sent through a group of optocouplers, differences in propagation delays will cause the data to arrive at the outputs of the optocouplers at different times. If this difference in propagation delay is large enough it will determine the maximum rate at which parallel data can be sent through the optocouplers. As mentioned earlier, tPSK can determine the maximum parallel data transmission rate. Figure 16 is the timing diagram of a typical parallel data application with both the clock and data lines being sent through the optocouplers. The figure shows data and clock signals at the inputs and outputs of the optocouplers. In this case, the data is assumed to be clocked off of the rising edge of the clock. VI DATA 50% INPUTS VO 2.5 V, CMOS CLOCK tPSK VI 50% DATA OUTPUTS VO 2.5 V, CMOS tPSK CLOCK tPSK Figure 15. Propagation delay skew waveform Figure 16. Parallel data transmission example Propagation delay skew repre sents the uncertainty of where an edge might be after being sent through an optocoupler. Figure 16 shows that there will be uncertainty in both the data and clock lines. These two areas of uncertainty must not overlap; otherwise, the clock signal might arrive before all of the data outputs have settled, or some of the data outputs may start to change before the clock signal has arrived. From these considerations, the absolute minimum pulse width that can be sent through op- tocouplers in a parallel application is twice tPSK. A cautious design should use a slightly longer pulse width to ensure that any additional uncertainty in the rest of the circuit does not cause a problem. 11 The HCPL-x710 optocouplers offer the advantage of guaranteed specifications for propagation delays, pulse-width distortion, and propagation delay skew over the recommended temperature, and power supply ranges. Digital Field Bus Communication Networks To date, despite its many drawbacks, the 4 - 20 mA analog current loop has been the most widely accepted standard for implementing process control systems. In today’s manufacturing environment, however, automated systems are expected to help manage the process, not merely monitor it. With the advent of digital field bus communication networks such as DeviceNet, PROFIBUS, and Smart Distributed Systems (SDS), gone are the days of constrained information. Controllers can now receive multiple readings from field devices (sensors, actuators, etc.) in addition to diagnostic information. The physical model for each of these digital field bus communication networks is very similar as shown in Figure 17. Each includes one or more buses, an interface unit, optical isolation, transceiver, and sensing and/or actuating devices. CONTROLLER BUS INTERFACE OPTICAL ISOLATION TRANSCEIVER FIELD BUS TRANSCEIVER TRANSCEIVER TRANSCEIVER TRANSCEIVER OPTICAL ISOLATION OPTICAL ISOLATION OPTICAL ISOLATION OPTICAL ISOLATION BUS INTERFACE BUS INTERFACE BUS INTERFACE BUS INTERFACE XXXXXX SENSOR YYY DEVICE CONFIGURATION MOTOR STARTER MOTOR CONTROLLER Figure 17. Typical field bus communication physical model Optical Isolation for Field Bus Networks To recognize the full benefits of these networks, Avago optocouplers are recom mended to provide galvanic isolation. As network communication is bi-directional (involving receiving data from and transmitting data onto the network), two Avago optocouplers are needed. By providing galvanic isolation, data integrity is retained via noise reduction and the elimination of false signals. In addition, the network receives maximum protection from power system faults and ground loops. Within an isolated node, such as the DeviceNet Node shown in Figure 18, some of the node’s components are referenced to a ground other than V- of the network. 12 These components could include such things as devices with serial ports, parallel ports, RS-232 and RS-485 type ports. As shown in Figure 18, power from the network is used only for the transceiver and input (network) side of the optocouplers. Isolation of nodes connected to any of the three types of digital field bus networks is best achieved by using the HCPL-x710 optocouplers. For each network, the HCPL-x710 satisify the critical propagation delay and pulse width distortion requirements over the temperature range of 0 °C to +85 °C, and power supply voltage range of 4.5 V to 5.5 V. AC LINE NODE/APP SPECIFIC LOCAL NODE SUPPLY µP/CAN HCPL -x710 GALVANIC ISOLATION BOUNDARY HCPL -x710 5 V REG. TRANSCEIVER DRAIN/SHIELD V+ (SIGNAL) V– (SIGNAL) V+ (POWER) V– (POWER) SIGNAL POWER NETWORK POWER SUPPLY Figure 18. Typical DeviceNet node. Implementing DeviceNet and SDS with the HCPL‑x710 Isolated Node Powered by the Network With transmission rates up to 1 Mbit/s, both DeviceNet and SDS are based upon the same broadcast-oriented, communica tions protocol — the Controller Area Network (CAN). Three types of isolated nodes are recommended for use on these networks: Isolated Node Powered by the Network (Figure 19), Isolated Node with Transceiver Powered by the Network (Figure 20), and Isolated Node Providing Power to the Network (Figure 21). This type of node is very flexible and as can be seen in Figure 19, is regarded as “isolated” because not all of its components have the same ground reference. Yet, all components are still powered by the network. This node contains two regulators: one is isolated and powers the CAN controller, node-specific application and isolated (node) side of the two optocouplers while the other is non-isolated. The non-isolated regulator supplies the transceiver and the non-isolated (network) half of the two optocouplers. NODE/APP SPECIFIC µP/CAN HCPL -x710 ISOLATED SWITCHING POWER SUPPLY HCPL -x710 GALVANIC ISOLATION BOUNDARY REG. TRANSCEIVER DRAIN/SHIELD V+ (SIGNAL) V– (SIGNAL) V+ (POWER) V– (POWER) SIGNAL POWER NETWORK POWER SUPPLY Figure 19. Isolated node powered by the network 13 Isolated Node with Transceiver Powered by the Network Figure 20 shows a node powered by both the network and another source. In this case, the transceiver and isolated (network) side of the two optocouplers are powered by the network. The rest of the node is powered by the AC line which is very beneficial when an application requires a significant amount of power. This method is also desirable as it does not heavily load the network. More importantly, the unique “dual-inverting” design of the HCPL-x710 ensure the network will not “lock-up” if either AC line power to the node is lost or the node powered-off. Specifically, when input power (VDD1) to the HCPL-x710 located in the transmit path is eliminated, a RECESSIVE bus state is ensured as the HCPL‑x710 output voltage (VO) go HIGH. *Bus V+ Sensing It is suggested that the Bus V+ sense block shown in Figure 20 be implemented. A locally powered node with an un-powered isolated Physical Layer will accumulate errors and become bus-off if it attempts to transmit. The Bus V+ sense signal would be used to change the BOI attribute of the DeviceNet Object to the “auto-reset” (01) value. Refer to Volume 1, Section 5.5.3. This would cause the node to continually reset until bus power was detected. Once power was detected, the BOI attribute would be returned to the “hold in bus-off” (00) value. The BOI attribute should not be left in the “auto-reset” (01) value since this defeats the jabber protection capability of the CAN error confinement. Any inexpensive low frequency optical isolator can be used to implement this feature. AC LINE NODE/APP SPECIFIC NON ISO 5V µP/CAN HCPL 0710 HCPL 0710 HCPL 0710 GALVANIC ISOLATION BOUNDARY REG. TRANSCEIVER DRAIN/SHIELD V+ (SIGNAL) V– (SIGNAL) V+ (POWER) V– (POWER) SIGNAL POWER NETWORK POWER SUPPLY * OPTIONAL FOR BUS V + SENSE Figure 20. Isolated node with transceiver powered by the network 14 Isolated Node Providing Power to the Network Figure 21 shows a node providing power to the network. The AC line powers a regulator which provides 5 V locally. The AC line also powers a 24 V isolated supply, which powers the network, and another 5 V regulator, which, in turn, powers the transceiver and isolated (network) side of the two optocouplers. This method is recommended when there are a limited number of devices on the network that do not require much power, thus eliminating the need for separate power supplies. More importantly, the unique “dual-inverting” design of the HCPL-x710 ensure the network will not “lock-up” if either AC line power to the node is lost or the node powered-off. Specifically, when input power (VDD1) to the HCPL-x710 located in the transmit path is eliminated, a RECESSIVE bus state is ensured as the HCPL‑x710 output voltage (VO) go HIGH. AC LINE DEVICENET NODE NODE/APP SPECIFIC 5 V REG. µP/CAN HCPL -0710 ISOLATED SWITCHING POWER SUPPLY HCPL -0710 GALVANIC ISOLATION BOUNDARY 5 V REG. TRANSCEIVER DRAIN/SHIELD SIGNAL POWER Figure 21. Isolated node providing power to the network 15 V+ (SIGNAL) V– (SIGNAL) V+ (POWER) V– (POWER) Power Supplies and Bypassing The recommended DeviceNet application circuit is shown in Figure 22. As the HCPL-x710 are fully compatible with CMOS logic level signals, the optocoupler is connected directly to the CAN transceiver. Two bypass capacitors (with values between 0.01 and 0.1 µF) are required and should be located as close as possible to GALVANIC ISOLATION BOUNDARY ISO 5 V 1 VDD1 TX0 2 VIN 0.01 µF 3 5V HCPL-0710 TxD VO 6 GND2 5 + 5 V+ CANH 3 SHIELD 7 8 VDD2 HCPL-0710 2 CAN– CANL REF 1 V– VREF RXD GND 0.01 µF 3 4 CAN+ 82C250 C4 0.01 µF GND1 4 6 VO D1 30 V VIN 2 VDD1 1 5V Figure 22. Recommended DeviceNet application circuit Implementing PROFIBUS with the HCPL-x710 An acronym for Process Fieldbus, PROFIBUS is essentially a twisted-pair serial link very similar to RS-485 capable of achieving high-speed communication up to 12 MBd. As shown in Figure 23, a PROFIBUS Controller (PBC) establishes the connection of a field automation unit (control or central processing station) or a field device to the transmission medium. The PBC consists of the line transceiver, optical isolation, frame character transmitter/receiver (UART), and the FDL/APP processor with the interface to the PROFIBUS user. PROFIBUS USER: CONTROL STATION (CENTRAL PROCESSING) OR FIELD DEVICE USER INTERFACE FDL/APP PROCESSOR UART PBC OPTICAL ISOLATION TRANSCEIVER MEDIUM Figure 23. PROFIBUS Controller (PBC) 16 + VCC Rs 5 GND2 ISO 5 V + 0.01 µF 7 GND 0.01 µF LINEAR OR SWITCHING REGULATOR VDD2 8 4 GND1 RX0 the input and output power-supply pins of the HCPLx710. For each capacitor, the total lead length between both ends of the capacitor and the power supply pins should not exceed 20 mm. The bypass capacitors are required because of the high-speed digital nature of the signals inside the optocoupler. C1 0.01 µF 500 V R1 1M Power Supplies and Bypassing The recommended PROFIBUS application circuit is shown in Figure 24. Since the HCPL-x710 are fully compatible with CMOS logic level signals, the optocoup ler is connected directly to the transceiver. Two bypass capacitors (with values between 0.01 and 0.1 µF) are required and should be located as close as possible to the input and output power-supply pins of the HCPLx710. For each capacitor, the total lead length between both ends of the capacitor and the power supply pins should not exceed 20 mm. The bypass capacitors are required because of the high-speed digital nature of the signals inside the optocoupler. GALVANIC ISOLATION BOUNDARY 5V 8 VDD2 HCPL-x710 5 GND2 0.01 µF GND1 4 HCPL-x710 3 4 GND1 B GND 5 VO 6 GND2 5 ISO 5 V 5V Tx ENABLE 1, 0 kΩ VCC 8 1 2 ANODE VE 7 3 CATHODE VO 6 0.01 µF 680 Ω GND 5 4 + RT SN75176B 0.01 µF 7 A 6 D 2 RE VDD2 8 2 VIN 4 8 VCC 7 SHIELD – 3 DE ISO 5 V 1 VDD1 0.01 µF 1 R 0.01 µF 3 5V Tx ISO 5 V VIN 2 6 VO Rx ISO 5 V VDD1 1 7 0.01 µF Being very similar to multi-station RS485 systems, the HCPL-061N optocoupler provides a transmit disable function that is necessary to make the bus free after each master/slave transmission cycle. Specifically, the HCPL-061N disables the transmitter of the line driver by putting it into a high state mode. In addition, the HCPL-061N switches the RX/TX driver IC into the listen mode. The HCPL-061N offers HCMOS compatibility and the high CMR performance (1 kV/µs at VCM = 1000 V) essential in industrial communication interfaces. HCPL-061N Figure 24. Recommended PROFIBUS application circuit For product information and a complete list of distributors, please go to our website: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries. Data subject to change. Copyright © 2005-2013 Avago Technologies. All rights reserved. Obsoletes AV01-0564EN AV02-0641EN - April 1, 2013 0.01 µF 1M